Despite what I wrote at T141332, it's actually pretty complicated. Instead we should just include all redirects, as the title of this task suggests.

The issue is Massviews can query tens of thousands of pages, and each can any number of redirects, increasing the total query count by an order of magnitude. That amounts to an enormous amount of data that may exhaust the client's memory. We might just include a disclaimer, or look into doing T157830 first so that memory consumption is done server-side.

I guess a nice warning should be sufficient for now.

In theory, redirects may increase the total number of pages by an order of magnitude. However, in practice, the average number of redirections per page is relatively small. For example, in my project a lot of pages have multiple redirections (alternative spelling and such). The total number of pages in the project category is 1190. The total number of pages including redirections is about 2000.

See Massview queries using category link (without redirects) and using Quarray (including all redirections).